The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 1990
Filed:
May. 08, 1987
Clayton H Allen, Chebeague Island, ME (US);
Elliott H Berger, Indianapolis, IN (US);
Other;
Abstract
In a hearing device, such as a circumaural earmuff cup or a circumaural earphone cup, either of which comprises an earpad assembly in contact with the external ear, through which sound is conducted to the external ear for the purpose of providing at the eardrum a sound pressure having a prescribed ratio with respect to the sound pressure at a source, the invention comprising a predetermined sound leakage path through said earpad assembly, to reduce the variable in said ratio, that is customarily encountered caused by the variations in the shape of the external ear from one user to another and by variations in position and force of contact of the earpad resting against the pinna.